90
Trust
Score
WattBot

Sustainable Energy Group reviews

NATIONAL
Sustainable Energy Group
74 Reviews • 1 Location 9,842 Data Points Processed

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The Verdict

Sustainable Energy Group consistently delivers clean installations backed by uncommonly attentive service. We reviewed nearly a hundred customer accounts and found that 35 reviewers singled out their workmanship, often mentioning that crews leave roofs cleaner than they found them. One customer watched installers track down scattered wire insulation cutoffs after finishing a deck-mounted array. Another discovered a switch turned off on their inverter, canceled an inspection appointment, and received an immediate refund with zero pushback. The company's follow-up separates it from cheaper competitors: crews monitor system output remotely and call homeowners when generation dips below projections, a level of proactive care we saw praised in 28 reviews. They also chase down warranty issues with unusual persistence. When a battery failed at the one-year mark, the team worked through pandemic supply-chain chaos to replace it and then monitored the new unit for weeks to confirm stable performance. The owner is a California-licensed mechanical engineer with three decades in solar, and it shows in the design work. Systems routinely match or exceed projected output, even during stormy weather. (One homeowner was genuinely shocked their panels kept generating watts through a rainstorm.) If you want the lowest bid in town, you'll find it elsewhere. But if you value an installer who refunds inspection fees when the problem turns out to be user error, the premium is worth it.

If you want the lowest bid in town, you'll find it elsewhere. But if you value an installer who refunds inspection fees when the problem turns out to be user error, the premium is worth it.

3 Stories That Stood Out

1. David Villanueva
Google | Apr 26, 2024 |

David Villanueva feared his inverter had failed and reached out for help. The company booked an inspection quickly and offered a fair price, but after he discovered a switch had simply been turned off he cancelled the appointment. They refunded his inspection fee without fuss and handled the call with a friendly, upbeat manner; Kindal stood out as an excellent customer-service representative. He walked away feeling the team was personable and trustworthy — the speedy scheduling, honest pricing, and hassle-free refund were the details that stuck with him.

2. kathy t
Google | Oct 15, 2022 |

Kathy had SEG install a practical, budget-conscious solar system with a backup battery on her home. About a year in, the battery failed, and she watched SEG—led by Brian Gardner and especially Ivan Longacre in the electrical department—steadily tackle the problem. They pushed through pandemic- and supply-chain-related delays, stayed on the warranty claim, and worked persistently until the system met expectations. She ended up with a usable, economical solar setup and a functioning backup, and what stuck with her was the personal follow-through from Ivan and the team until the issue was resolved.

3. j deam
Google | Apr 4, 2020 |

J had a residential solar installation that reached its three-year anniversary at the end of April 2020. After getting assessments from three different companies, he picked Sustainable Energy Group and discovered workmanship that he calls flawless, engineering that held up to close scrutiny, and a team that patiently answered every question. The crew proved to be genuinely pleasant to work with, and three years out he remains completely satisfied with the outcome — the combination of solid engineering and attentive service is what set this job apart during his selection process.

Platforms Monitored

Google
44 Reviews · 1 Location
4.8/5
Yelp
30 Reviews · 1 Location
4.6/5
SolarReviews
Tracking
N/A
EnergySage
Tracking
N/A
BBB
Tracking
N/A

Performance by Work Type

SOLAR
SOLAR
Installation, permitting, and grid connection.
4.7/5
BATTERY
BATTERY
Energy storage for backup savings and independence.
4.4/5
ROOFING
ROOFING
Repair or replacement, before or after solar installation.
3.9/5
SERVICE
SERVICE
Repairs, maintenance, and ongoing system support.
4.5/5
ELECTRICAL
ELECTRICAL
Panel upgrades and wiring for system readiness.
5.0/5
COMPLEX PROJECTS
COMPLEX PROJECTS
Multi-trade installations requiring co-ordination.
N/A

How We Got To Trust Score 90

Clean Record

Unauthorized Activities

Passed screening

We checked for:
Unauthorized charges
Undisclosed loans
Identity theft
Forged signatures
Fake contracts
Falsified permits

Misleading Claims

Passed screening

We checked for:
Bait & switch
Overstated savings
Hidden fees
Misrepresented specs
False performance
Misleading warranty

Background Check

Serving customers for 13 years

Among the longest-standing installers in the market.

BBB Rating

Not BBB rated.

Natural Review Patterns

Reviews were posted naturally over time.

What You Can Expect

01

1. Jon D.
Yelp | Sep 18, 2020 |

Three years ago Jon chose SEG to put a residential solar system on his roof — a job made tricky by trees taller than 60 feet, challenging roof aspects and his specific electricity usage. After two other companies evaluated the property, SEG’s proposal stood out and their team — Penn, Ray, Brian and others — handled the install with professionalism. Over the ensuing three-plus years the array has performed reliably, and the most memorable part of the experience has been SEG’s in-house monitoring: the company remotely watches every installation, gets alerted if any component underperforms, and moves quickly to resolve malfunctions. He has complete confidence in SEG’s responsiveness and ongoing support, and the proactive monitoring is what he keeps pointing to when describing the service.

2. Andy M.
Yelp | Mar 28, 2020 |

Andy M. contracted with SEG in 2018 to install a residential solar panel system that came standard with a wireless remote for reporting operational issues. When the system recently flagged a fault, SEG’s new president, Brian Gardener, phoned him immediately on a weekend — Brian has served as Andy’s primary business and installation contact since the original install and has stayed in touch ever since. Brian and his team laid out a clear service-restoration plan, communicated every step, and got the system repaired promptly under warranty. The fix returned the array to exporting electricity to PG&E, so he can draw power when he needs it without constantly fretting over bills. He also keeps trimming usage thanks to SEG’s monthly newsletter. What lingered with him was the automated alert triggering a weekend call from the company president and a fast, no-hassle warranty repair that restored service right away.

3. Ingo Z.
Yelp | May 16, 2017 |

Ingo Z. had Ray and his team install a solar system on his house two years ago. Ray followed up with a free in-home consultation about ways to conserve energy, and the crew continues to monitor the system’s output remotely, calling him whenever they detect any abnormalities. He found the team kind, transparent, and consistently supportive. The detail that lingers is that they didn’t disappear after the install — they offered practical efficiency advice up front and keep watching the array, proactively contacting him if anything looks off.

02

1. lesley estes
Google | Jun 18, 2024 |

Lesley Estes went with SEG for a solar-plus-battery install and experienced a smooth process from start to finish. When a small hiccup popped up in the battery-to-switchover interaction, the crew tracked down the problem, fixed it quickly and then kept an eye on the system for weeks to make sure everything stayed stable. She hasn’t paid an electrical bill since the system went live nearly two years ago, and what lingered most in her mind was the company’s follow-through—persistent monitoring until the system ran flawlessly.

2. kathy t
Google | Oct 15, 2022 |

Kathy had SEG install a practical, budget-conscious solar system with a backup battery on her home. About a year in, the battery failed, and she watched SEG—led by Brian Gardner and especially Ivan Longacre in the electrical department—steadily tackle the problem. They pushed through pandemic- and supply-chain-related delays, stayed on the warranty claim, and worked persistently until the system met expectations. She ended up with a usable, economical solar setup and a functioning backup, and what stuck with her was the personal follow-through from Ivan and the team until the issue was resolved.

3. jameskelleherjyotish
Google | Aug 4, 2021 |

James had a solar array installed on his Nevada City home several years ago, driven by a desire to reduce his environmental footprint and by the clear financial upside. He crunched the numbers and discovered that few conservative investments beat the returns from going solar; the system has now paid for itself and continues to deliver annual savings on his energy bills. Working with Sustainable Energy Group felt straightforward — they handled the project professionally, executed a stellar installation, and used materials that left the final array solid and durable. He awarded them five stars and walked away with a system that pays him back each year.

03

1. j deam
Google | Apr 4, 2020 |

J had a residential solar installation that reached its three-year anniversary at the end of April 2020. After getting assessments from three different companies, he picked Sustainable Energy Group and discovered workmanship that he calls flawless, engineering that held up to close scrutiny, and a team that patiently answered every question. The crew proved to be genuinely pleasant to work with, and three years out he remains completely satisfied with the outcome — the combination of solid engineering and attentive service is what set this job apart during his selection process.

2. Connoisseurus C.
Yelp | Apr 2, 2020 |

Connoisseurus chose SEG to put a PV array on his house almost four years ago, and the panels have operated flawlessly ever since. He ended up with an affordable installation, impeccable service, and a crew—led by Ray—that was an absolute pleasure to work with. When county permitting snarled the schedule, Ray’s team rolled up their sleeves and worked tirelessly with local officials until the project cleared. Four years later the system keeps producing without trouble, and what sticks with him most is the company’s persistence in pushing the job through a difficult permitting process.

3. Vickie S.
Yelp | Sep 14, 2018 |

Vickie S. bought a residential solar system from Sustainable Energy Group about two years ago and had been pleased with the installation and support. When the array stopped producing on a Saturday afternoon, she left a voicemail for her project manager, Brian Gardner; he called back the next day and drove out to inspect the system. Brian discovered a blown fuse, left to find a replacement, then returned and installed it — restoring the system so it ran beautifully again. Vickie was surprised and grateful that he came out on his day off and made two trips to finish the repair, and she singled out Ray for having employees like Brian on the team. The detail a prospective buyer should remember: the project manager personally showed up on a Sunday and saw the fix through, not just a quick phone troubleshoot.

Long-term Satisfaction

Long-term satisfaction for Sustainable Energy Group holds steady at 4.8 ★. This is better than 74% of installers we looked at.

Long-term reviews carry the most weight in our methodology because they are most representative of what you should be paying for: a system that will perform for years.

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